I've never met him, know zero about his training/methods/if he's a prat or a saint. I am not a CA devotee who thinks the sun rises and sets out of his backside. What I do know, from working in yards in Europe and NA is that I can see his point in some cases. His yard is not a public riding school full of 20yo ponies. If his people skills arent up to speed? So be it, I've yet to meet a trainer who's main priority was makin small talk to owners.... their main focus tends to be "talking" to the four legged sort put in front of them.
I've already seen that you don't like him... fair enough. I have yet to meet a Parelli horse who wasn't a prat... but I don't come on here to push the fact that I don't like Parelli because I know other people are entitled to their own beliefs and if it works for them who am I to judge?